Oil application roller, fixing apparatus and image forming apparatus

Abstract

In one embodiment, an oil application roller contacts a surface of a fixing rotary member of a fixing apparatus, and applies oil to the surface of the fixing rotary member. A porous sheet is wrapped around a peripheral surface of a cylindrical member, and an end portion on a wrapping start side of the porous sheet is inclined relative to a rotation shaft of the oil application roller.

1 . An oil application roller comprising a cylindrical member impregnated with oil, and a porous sheet wrapped around a peripheral surface of the cylindrical member, and being configured to be in contact with a surface of a fixing rotary member of a fixing apparatus to apply the oil to the surface of the fixing rotary member,
 wherein an edge on a wrapping start side of the porous sheet has a shape formed by being cut in a straight line or a curved line that is inclined relative to a rotation shaft of the oil application roller.   
     
     
         2 . The oil application roller according to  claim 1 ,
 wherein there are a plurality of said straight or curved lines, intersecting each other.   
     
     
         3 . An oil application roller comprising a cylindrical member impregnated with oil, and a porous sheet wrapped around a peripheral surface of the cylindrical member, and being configured to be in contact with a surface of a fixing rotary member of a fixing apparatus to apply the oil to the surface of the fixing rotary member,
 wherein the width of the porous sheet is gradually narrowed toward an end portion on a wrapping start side of the porous sheet.   
     
     
         4 . The oil application roller according to  claim 3 ,
 wherein the width of the porous sheet is gradually narrowed such that the end portion on the wrapping start side of the porous sheet is formed in a triangle or a trapezoid shape.   
     
     
         5 . The oil application roller according to  claim 1 ,
 wherein the porous sheet is wrapped around the peripheral surface of the cylindrical member a number of times corresponding to an integer of two or more, and   the shape of an edge on the wrapping start side of the porous sheet is such that on the peripheral surface of the cylindrical member, the edge on the wrapping start side and an edge on a wrapping end side of the porous sheet are adjacent to and parallel to each other, without mutually overlapping.   
     
     
         6 . A fixing apparatus in which the oil application roller according to  claim 1  contacts a surface of a fixing rotary member. 
     
     
         7 . An image forming apparatus comprising the fixing apparatus according to  claim 6 . 
     
     
         8 . A fixing apparatus in which the oil application roller according to  claim 5  contacts a surface of a fixing rotary member. 
     
     
         9 . An image forming apparatus comprising the fixing apparatus according to  claim 8 .